class_docstr: A helper class that represents input string that to be modified.
  
  Text that Sample contains parsed in data set,
  ``TextField`` provides multiple methods for Sample to modify.
  
  Support sentence level and word level modification,
  default using word level API.
docstr: Dependency parsing.
  
  Example::
  
      given sentence: 'The quick brown fox jumps over the lazy dog.'
  
      >>
          The     DT      4       det
          quick   JJ      4       amod
          brown   JJ      4       amod
          fox     NN      5       nsubj
          jumps   VBZ     0       root
          over    IN      9       case
          the     DT      9       det
          lazy    JJ      9       amod
          dog     NN      5       obl
  
  :return: A list of tuples, *(token, pos, target, type)*
docstr_tok: ["Dependency","parsing",".","Example",":",":","given","sentence",":","'The","quick","brown","fox","jumps","over","the","lazy","dog",".","'",">",">","The","DT","4","det","quick","JJ","4","amod","brown","JJ","4","amod","fox","NN","5","nsubj","jumps","VBZ","0","root","over","IN","9","case","the","DT","9","det","lazy","JJ","9","amod","dog","NN","5","obl",":","return",":","A","list","of","tuples",",","*","(","token",",","pos",",","target",",","type",")","*"]
code: def dependency_parsing(self):
      r"""
      Dependency parsing.
  
      Example::
  
          given sentence: 'The quick brown fox jumps over the lazy dog.'
  
          >>
              The	DT	4	det
              quick	JJ	4	amod
              brown	JJ	4	amod
              fox	NN	5	nsubj
              jumps	VBZ	0	root
              over	IN	9	case
              the	DT	9	det
              lazy	JJ	9	amod
              dog	NN	5	obl
  
      :return: A list of tuples, *(token, pos, target, type)*
  
      """
      if not self._dp_tags:
          self._dp_tags = self.text_processor.get_dep_parser(
              self.field_value,
              split_by_space=self.split_by_space,
              is_one_sent=self.is_one_sent,
          )
  
      return self._dp_tags
  
imports: from .field import Field
  from ....common.utils.list_op import *
  from ....common.preprocess.en_processor import EnProcessor
  from ....common.settings import ORIGIN, TASK_MASK, MODIFIED_MASK
label_desc: Use image node_id 24 for calling the TextField obj's underlying member method code with example usage: obj.dependency_parsing() and returns: self